A compact dual-band quasi-elliptic filter with high selectivity is developed and investigated in this communication.It employs two hybrid-structure substrate integrated waveguide(SIW)triplets,which show completely inv...A compact dual-band quasi-elliptic filter with high selectivity is developed and investigated in this communication.It employs two hybrid-structure substrate integrated waveguide(SIW)triplets,which show completely inverse transfer responses under the same conditions of inductive cross coupling.The first meander-line-based triplet is able to produce a transmission zero(TZ)above the passband.Whereas the second SIW triplet,which is composed by a composite right/left-handed(CRLH)resonator,creates a TZ below the passband.By utilizing these features,a dual-band quasi-elliptic filter based on SIW dual-mode resonances(TE101 and TE201),whose operating frequencies are allocated at 8 GHz and 10 GHz,is designed for demonstration.The design process,principles,and experiments are carefully described in this communication.The measured and simulated results are in good agreement,indicating excellent electrical performance with low loss,compact device size and high selectivity.The most notable point is that a dual-band quasi-elliptic filter on SIW platforms is obtained with all inductive couplings for the first time,which shows a unique benefit in eliminating negative-coupling structures while permitting miniaturization for SIW dual-band filter design.展开更多
The study on a miniaturized, low-voltage, wide-bandwidth, high-efficiency modified V-shaped microstrip meander-line slow-wave structure is presented. This structure is evolved from the original U-shaped microstrip mea...The study on a miniaturized, low-voltage, wide-bandwidth, high-efficiency modified V-shaped microstrip meander-line slow-wave structure is presented. This structure is evolved from the original U-shaped microstrip meander-line slow-wave structure, combining the advantages of a traditional microstrip and a rectangular helix. In this paper, simulations of the electromagnetic characteristics and the beam-wave interaction of this structure are carried out. Our study shows that when the design voltage and the current of a sheet electron beam are set to be 4700 V and 100 mA, respectively, this miniature millimeter-wave power amplifier is capable of delivering 160-W output power with a corresponding gain of 37.3 dB and a maximum interaction efficiency of 34% at 97 GHz.展开更多
基金supported in part by the Natural Sciences and Engineering Research Council(NSERC)of Canadain part by the China Scholarship Council(Grant No.202006070154).
文摘A compact dual-band quasi-elliptic filter with high selectivity is developed and investigated in this communication.It employs two hybrid-structure substrate integrated waveguide(SIW)triplets,which show completely inverse transfer responses under the same conditions of inductive cross coupling.The first meander-line-based triplet is able to produce a transmission zero(TZ)above the passband.Whereas the second SIW triplet,which is composed by a composite right/left-handed(CRLH)resonator,creates a TZ below the passband.By utilizing these features,a dual-band quasi-elliptic filter based on SIW dual-mode resonances(TE101 and TE201),whose operating frequencies are allocated at 8 GHz and 10 GHz,is designed for demonstration.The design process,principles,and experiments are carefully described in this communication.The measured and simulated results are in good agreement,indicating excellent electrical performance with low loss,compact device size and high selectivity.The most notable point is that a dual-band quasi-elliptic filter on SIW platforms is obtained with all inductive couplings for the first time,which shows a unique benefit in eliminating negative-coupling structures while permitting miniaturization for SIW dual-band filter design.
基金Project supported by the National Natural Science Foundation of China (Grant No. 60971038)the Fundamental Research Funds for the Central Universities (Grant No. ZYGX2009Z003)
文摘The study on a miniaturized, low-voltage, wide-bandwidth, high-efficiency modified V-shaped microstrip meander-line slow-wave structure is presented. This structure is evolved from the original U-shaped microstrip meander-line slow-wave structure, combining the advantages of a traditional microstrip and a rectangular helix. In this paper, simulations of the electromagnetic characteristics and the beam-wave interaction of this structure are carried out. Our study shows that when the design voltage and the current of a sheet electron beam are set to be 4700 V and 100 mA, respectively, this miniature millimeter-wave power amplifier is capable of delivering 160-W output power with a corresponding gain of 37.3 dB and a maximum interaction efficiency of 34% at 97 GHz.
